Most Helpful Girl
Could be from 4 all the way (though rarely I think) 100. Hair loss is natural. Your hair grows in phases and each hair could be going through a different phase. One of those phases is shedding.
But if you notice you're losing more hair compared to what you used to (and sometimes the fact that you're starting to notice the hair loss could mean you really are losing more hair than you used to) you might want to examine what's changed jn your life. Diet, exercise, stress levels, medications or hormones, environmental stuff, and other stuff could be affecting your hair growth and loss.